Audit log or report name

Data retention time

Admin audit log 6 months
Calendar audit log 6 months
OAuth Token audit log 6 months
Mobile audit log (Google Apps Unlimited) 6 months
SAML audit log 6 months
Drive audit log (Google Apps Unlimited) 6 months
Email log search 30 days
Account activity reports 6 months
Security reports 6 months
Groups audit log 6 months
Audit data retrieved using the API 6 months
Reporting data retrieved using the API 15 months

For any audit log or report not mentioned above the retention time should be 6 months.

There's nothing we can do on our end after the period of the data retention time, we have no way to recover it, even in Google end.

 

For message tracing in Google end, the data retention time is seven days.